wait u want to use a cooler for a dwc...? uhhhh... have fun cutting that bitch up. I misunderstood a cooler would be great for a seperate res. but as a main root chamber u need to figure out how ur gonna fit/cut it for net pots and other stuff. Rubbermaids and buckets, a cooler isnt going to keep u that much colder with an airpump and root system.